I think this increased vigilance result is consistent with the idea that seet calls are given towards terrestrial predators when there are vulnerable individuals in the nest.

Our data show that seet calls are given to terrestrial predators approaching active nests, especially when offspring are most vulnerable. Tegtman et al. find that fairy-wrens are less likely to flee and more likely to increase vigilance to seet vs aerial alarms.

😮

This bower was located next to a nursery, something tells me the male bowerbird owner has been pinching from the kids 😆